PipelineServiceImpl does not close DataSources created for PULL transfers

[ndr-brt]

Bug Report

Describe the Bug

PipelineServiceImpl does not close DataSources created for PULL transfers

Expected Behavior

To close them

Observed Behavior

In a PULL transfer every call to the public endpoint causes a new DataSource to be created

Context Information

Version: main branch

Detailed Description

If applicable, add screenshots and logs to help explain your problem.

Possible Implementation

You already know the root cause of the erroneous state and how to fix it? Feel free to share your thoughts.